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-rw-r--r--contrib/btree_gist/btree_float4.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/contrib/btree_gist/btree_float4.c b/contrib/btree_gist/btree_float4.c
new file mode 100644
index 0000000..3cbd9a0
--- /dev/null
+++ b/contrib/btree_gist/btree_float4.c
@@ -0,0 +1,212 @@
+/*
+ * contrib/btree_gist/btree_float4.c
+ */
+#include "postgres.h"
+
+#include "btree_gist.h"
+#include "btree_utils_num.h"
+#include "utils/float.h"
+
+typedef struct float4key
+{
+ float4 lower;
+ float4 upper;
+} float4KEY;
+
+/*
+** float4 ops
+*/
+PG_FUNCTION_INFO_V1(gbt_float4_compress);
+PG_FUNCTION_INFO_V1(gbt_float4_fetch);
+PG_FUNCTION_INFO_V1(gbt_float4_union);
+PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
+PG_FUNCTION_INFO_V1(gbt_float4_consistent);
+PG_FUNCTION_INFO_V1(gbt_float4_distance);
+PG_FUNCTION_INFO_V1(gbt_float4_penalty);
+PG_FUNCTION_INFO_V1(gbt_float4_same);
+
+static bool
+gbt_float4gt(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const float4 *) a) > *((const float4 *) b));
+}
+static bool
+gbt_float4ge(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const float4 *) a) >= *((const float4 *) b));
+}
+static bool
+gbt_float4eq(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const float4 *) a) == *((const float4 *) b));
+}
+static bool
+gbt_float4le(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const float4 *) a) <= *((const float4 *) b));
+}
+static bool
+gbt_float4lt(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return (*((const float4 *) a) < *((const float4 *) b));
+}
+
+static int
+gbt_float4key_cmp(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ float4KEY *ia = (float4KEY *) (((const Nsrt *) a)->t);
+ float4KEY *ib = (float4KEY *) (((const Nsrt *) b)->t);
+
+ if (ia->lower == ib->lower)
+ {
+ if (ia->upper == ib->upper)
+ return 0;
+
+ return (ia->upper > ib->upper) ? 1 : -1;
+ }
+
+ return (ia->lower > ib->lower) ? 1 : -1;
+}
+
+static float8
+gbt_float4_dist(const void *a, const void *b, FmgrInfo *flinfo)
+{
+ return GET_FLOAT_DISTANCE(float4, a, b);
+}
+
+
+static const gbtree_ninfo tinfo =
+{
+ gbt_t_float4,
+ sizeof(float4),
+ 8, /* sizeof(gbtreekey8) */
+ gbt_float4gt,
+ gbt_float4ge,
+ gbt_float4eq,
+ gbt_float4le,
+ gbt_float4lt,
+ gbt_float4key_cmp,
+ gbt_float4_dist
+};
+
+
+PG_FUNCTION_INFO_V1(float4_dist);
+Datum
+float4_dist(PG_FUNCTION_ARGS)
+{
+ float4 a = PG_GETARG_FLOAT4(0);
+ float4 b = PG_GETARG_FLOAT4(1);
+ float4 r;
+
+ r = a - b;
+ if (unlikely(isinf(r)) && !isinf(a) && !isinf(b))
+ float_overflow_error();
+
+ PG_RETURN_FLOAT4(Abs(r));
+}
+
+
+/**************************************************
+ * float4 ops
+ **************************************************/
+
+
+Datum
+gbt_float4_compress(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+ PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
+}
+
+Datum
+gbt_float4_fetch(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+ PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
+
+Datum
+gbt_float4_consistent(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+ float4 query = PG_GETARG_FLOAT4(1);
+ StrategyNumber strategy = (StrategyNumber) PG_GETARG_UINT16(2);
+
+ /* Oid subtype = PG_GETARG_OID(3); */
+ bool *recheck = (bool *) PG_GETARG_POINTER(4);
+ float4KEY *kkk = (float4KEY *) DatumGetPointer(entry->key);
+ GBT_NUMKEY_R key;
+
+ /* All cases served by this function are exact */
+ *recheck = false;
+
+ key.lower = (GBT_NUMKEY *) &kkk->lower;
+ key.upper = (GBT_NUMKEY *) &kkk->upper;
+
+ PG_RETURN_BOOL(gbt_num_consistent(&key, (void *) &query, &strategy,
+ GIST_LEAF(entry), &tinfo,
+ fcinfo->flinfo));
+}
+
+
+Datum
+gbt_float4_distance(PG_FUNCTION_ARGS)
+{
+ GISTENTRY *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+ float4 query = PG_GETARG_FLOAT4(1);
+
+ /* Oid subtype = PG_GETARG_OID(3); */
+ float4KEY *kkk = (float4KEY *) DatumGetPointer(entry->key);
+ GBT_NUMKEY_R key;
+
+ key.lower = (GBT_NUMKEY *) &kkk->lower;
+ key.upper = (GBT_NUMKEY *) &kkk->upper;
+
+ PG_RETURN_FLOAT8(gbt_num_distance(&key, (void *) &query, GIST_LEAF(entry),
+ &tinfo, fcinfo->flinfo));
+}
+
+
+Datum
+gbt_float4_union(PG_FUNCTION_ARGS)
+{
+ GistEntryVector *entryvec = (GistEntryVector *) PG_GETARG_POINTER(0);
+ void *out = palloc(sizeof(float4KEY));
+
+ *(int *) PG_GETARG_POINTER(1) = sizeof(float4KEY);
+ PG_RETURN_POINTER(gbt_num_union((void *) out, entryvec, &tinfo, fcinfo->flinfo));
+}
+
+
+Datum
+gbt_float4_penalty(PG_FUNCTION_ARGS)
+{
+ float4KEY *origentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(0))->key);
+ float4KEY *newentry = (float4KEY *) DatumGetPointer(((GISTENTRY *) PG_GETARG_POINTER(1))->key);
+ float *result = (float *) PG_GETARG_POINTER(2);
+
+ penalty_num(result, origentry->lower, origentry->upper, newentry->lower, newentry->upper);
+
+ PG_RETURN_POINTER(result);
+}
+
+Datum
+gbt_float4_picksplit(PG_FUNCTION_ARGS)
+{
+ PG_RETURN_POINTER(gbt_num_picksplit((GistEntryVector *) PG_GETARG_POINTER(0),
+ (GIST_SPLITVEC *) PG_GETARG_POINTER(1),
+ &tinfo, fcinfo->flinfo));
+}
+
+Datum
+gbt_float4_same(PG_FUNCTION_ARGS)
+{
+ float4KEY *b1 = (float4KEY *) PG_GETARG_POINTER(0);
+ float4KEY *b2 = (float4KEY *) PG_GETARG_POINTER(1);
+ bool *result = (bool *) PG_GETARG_POINTER(2);
+
+ *result = gbt_num_same((void *) b1, (void *) b2, &tinfo, fcinfo->flinfo);
+ PG_RETURN_POINTER(result);
+}